补齐 Grok CC bridge 同号重试

backend/internal/service/openai_gateway_grok_chat_bridge.go

@@ -633,11 +633,15 @@ func (s *OpenAIGatewayService) forwardGrokChatCompletionsViaResponses(
 		})
 		s.handleGrokAccountUpstreamError(withGrokTeamRateLimitModel(ctx, upstreamModel), account, resp.StatusCode, resp.Header, respBody)
 		if s.shouldFailoverGrokUpstreamError(resp.StatusCode, respBody) {
+			retryable, retryDelay, retryDeadline := grokSameAccountRetryMetadata(account, resp.StatusCode, respBody)
 			return nil, &UpstreamFailoverError{
 				StatusCode:             resp.StatusCode,
 				ResponseBody:           respBody,
 				ResponseHeaders:        resp.Header.Clone(),
-				RetryableOnSameAccount: account.IsPoolMode() && account.IsPoolModeRetryableStatus(resp.StatusCode),
+				RetryableOnSameAccount:  retryable,
+				RequestScopedTransient:   retryable && resp.StatusCode == http.StatusTooManyRequests,
+				SameAccountRetryDelay:    retryDelay,
+				SameAccountRetryDeadline: retryDeadline,
 			}
 		}
 		return s.handleChatCompletionsErrorResponse(resp, c, account, billingModel)

backend/internal/service/openai_gateway_grok_chat_bridge_test.go

@@ -614,6 +614,9 @@ func TestForwardGrokChatViaResponses429UsesGrokRateLimitPolicy(t *testing.T) {
 	var failoverErr *UpstreamFailoverError
 	require.True(t, errors.As(err, &failoverErr))
 	require.Equal(t, http.StatusTooManyRequests, failoverErr.StatusCode)
+	require.True(t, failoverErr.RetryableOnSameAccount)
+	require.Equal(t, 500*time.Millisecond, failoverErr.SameAccountRetryDelay)
+	require.False(t, failoverErr.SameAccountRetryDeadline.IsZero())
 	require.Equal(t, "45", failoverErr.ResponseHeaders.Get("Retry-After"))
 	require.Equal(t, xai.DefaultCLIBaseURL+"/responses", upstream.lastReq.URL.String())
 	require.Equal(t, grokChatResponsesEndpoint, GetActualOpenAIUpstreamEndpoint(c))